[Bug 64652] New: Occasional test failure at t/apache/expr_string.t at line 87

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[Bug 64652] New: Occasional test failure at t/apache/expr_string.t at line 87

Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=64652

            Bug ID: 64652
           Summary: Occasional test failure at t/apache/expr_string.t at
                    line 87
           Product: Apache httpd-2
           Version: 2.4.43
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: All
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

Ubuntu's CI has seen an irregularly recurring test failure:

t/apache/etags.t .................... ok
t/apache/expr.t ..................... ok
# Failed test 17 in t/apache/expr_string.t at line 87
t/apache/expr_string.t ..............
Failed 1/29 subtests
t/apache/getfile.t .................. ok

https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1890302
https://autopkgtest.ubuntu.com/packages/a/apache2/groovy/armhf

We have not been able to reproduce the issue on local hardware, only in CI.  We
had attempted to add debug info to help isolate the cause, but with it added
the test case always passed.


It looks like Apache2 upstream also noticed this failure in the Apache2 CI:

http://mail-archives.apache.org/mod_mbox/httpd-dev/202001.mbox/%3C20200109141229.GA15490@...%3E
http://mail-archives.apache.org/mod_mbox/httpd-dev/202001.mbox/%3C20200113145056.GA12523%40redhat.com%3E
https://travis-ci.org/github/apache/httpd/jobs/633442262

This thread speculates it's a timing issue reading the error log too quickly,
and suggests adding a usleep() might work around the problem.  I've applied
this change to Ubuntu to see if it passes our CI.

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[Bug 64652] Occasional test failure at t/apache/expr_string.t at line 87

Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=64652

--- Comment #1 from Bryce Harrington <[hidden email]> ---
Btw, we're seeing this on the armhf architecture, but the apache mailing list
discussion suggests its not arch-specific.

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[Bug 64652] Occasional test failure at t/apache/expr_string.t at line 87

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=64652

--- Comment #2 from Joe Orton <[hidden email]> ---
What revision of the perl framework are you seeing that fail with?

I don't think we have seen this fail in Travis since applying r1844947

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[Bug 64652] Occasional test failure at t/apache/expr_string.t at line 87

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In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=64652

--- Comment #3 from Joe Orton <[hidden email]> ---
No idea where that rev number came from.  Since r1872705 I meant

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[Bug 64652] Occasional test failure at t/apache/expr_string.t at line 87

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https://bz.apache.org/bugzilla/show_bug.cgi?id=64652

Joe Orton <[hidden email]> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

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